REFERENCE INFORMATION INSTRUMENTS CIRCUIT None of the following instruments and accessories should work when the fOtary switch is in the STOP position: VoltmeterWait-to-start lamp Temperature gauge Oil pressure gauge Fuel gauge Wrndshield wiper/washer Brake warning tamp If any of the instruments and accessories work when the rotary switch is in the RUN position, power is available and the circuit I breaker is OK The wait-to-start tamp is not an accurate indication of glow plug operation. Make sure the glow plugs are Operating PrOPeIfY BEFORE you check out the light. Go to the glow plugs circuit tests, page 2-289. Return here if the light still doesnt operate property. The wait-to-start lamp should come on when the engine is below 120°F (49%) and the rotary switch is first turned to the RUN position. BRAKE \ lli NARNING LMMP WATT-TO ---  TM 9-2320-387-24-I ENGINE 2-307